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IX. Some Accounts of the Fcetus in utero 
being differently affedled by the Small Pox . 
By W. Watfon, F. R. S. 
Read Dec. 7. HAT the human Species fhould 
17+9 JL °nly once l n their Lives be liable 
to the Small Pox, has long, been obferved with Sur- 
prize, both by Phyficians and Philofophers : Nor is 
it lefs extraordinary, that the Child before Birth, 
which in every Circumftance is equally fupported by 
its receiving and circulating its Mothers Fluids, 
fhould be fo differently affc&ed by that Diftemper. 
From the Diffe&ions of thofe who have died of 
the Small Pox, we find that the Vifcera arc (ubjedt 
to the variolous Abfceffes as well as the Skin j but 
that the Foetus does not always partake of the In- 
fection from its Mother, or the Mother from the 
Foetus , is the Subject of this Paper. 
About four Years fincc I attended a young Man, 
a Servant to a Carpenter, who had a very putrid and 
offenfive kind of Small Pox ; of which neverthelcfs 
he recovered. His Miftrefs, during his Illnefs, came 
frequently into his Room, and fometimes continued 
there a confiderable Time. She was then about 
feven Months gone with Child, but had had the 
Small Pox herfelf many Years before. At the ufual 
Time fhe was delivered of a Girl, whom I faw very 
foon after its Birth: and there appeared very plain- 
ly the Marks of about forty Pnftules, in different 
Parts of her Body. From this Appearance I then in- 
form’d the Parents, that I apprehended the Child 
G g z would 
